fix: correctly calculate remaining life and apply ordering using aliased column in EAC queries.

src/equipment/service.py

@@ -2,7 +2,7 @@ import os
 import logging
 from typing import Optional, TypedDict, Any
 
-from sqlalchemy import Select, Delete, Float, func, cast, String, text, case
+from sqlalchemy import Select, Delete, Float, func, cast, String, text, case, asc, desc
 from sqlalchemy.orm import selectinload
 from sqlalchemy.exc import SQLAlchemyError
 from sqlalchemy.ext.asyncio import AsyncSession
@@ -395,13 +395,17 @@ async def get_top_10_economic_life(*, db_session: DbSession, common) -> list[Equ
                     (current_year - Equipment.minimum_eac_year) >= 0,
                     (current_year - Equipment.minimum_eac_year),
                 ),
+                (
+                    (Equipment.minimum_eac_year - current_year) >= 0,
+                    (Equipment.minimum_eac_year - current_year),
+                ),
             else_=0,
         ).label("remaining_life")
     )
     .filter(Equipment.minimum_eac_year != None)
     .filter((Equipment.minimum_eac != None) & (Equipment.minimum_eac != 0))
         # .filter((current_year - Equipment.minimum_eac_year) >= 0)
-        .order_by((current_year - Equipment.minimum_eac_year).desc())
+        .order_by(desc("remaining_life"))
         .order_by(func.abs(Equipment.minimum_eac).desc())
     )
 
@@ -427,13 +431,17 @@ async def get_top_10_replacement_priorities(*, db_session: DbSession, common) ->
                     (current_year - Equipment.minimum_eac_year) >= 0,
                     (current_year - Equipment.minimum_eac_year),
                 ),
+                (
+                    (Equipment.minimum_eac_year - current_year) >= 0,
+                    (Equipment.minimum_eac_year - current_year),
+                ),
                 else_=0,
             ).label("remaining_life")
         )
         .filter(Equipment.minimum_eac_year != None)
         .filter((Equipment.minimum_eac != None) & (Equipment.minimum_eac != 0))
         # .filter((current_year - Equipment.minimum_eac_year) >= 0)
-        .order_by((current_year - Equipment.minimum_eac_year).asc())
+        .order_by(asc("remaining_life"))
         .order_by(func.abs(Equipment.minimum_eac).desc())
     )